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Message-ID: <4aab64fe-18ab-425b-9dc1-e4e9dc6b0087@igalia.com>
Date: Mon, 26 Feb 2024 09:26:33 -0300
From: Maíra Canal <mcanal@...lia.com>
To: Maxime Ripard <mripard@...nel.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>, Heiko Stübner
<heiko@...ech.de>, Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>
Cc: Hans Verkuil <hverkuil@...all.nl>,
Sebastian Wick <sebastian.wick@...hat.com>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v7 04/36] drm/tests: Add helper to create mock crtc
On 2/22/24 15:13, Maxime Ripard wrote:
> We're going to need a full-blown, functional, KMS device to test more
> components of the atomic modesetting infrastructure.
>
> Let's add a new helper to create a dumb, mocked, CRTC. By default it
> will create a CRTC relying only on the default helpers, but drivers are
> free to deviate from that.
>
> Signed-off-by: Maxime Ripard <mripard@...nel.org>
Reviewed-by: Maíra Canal <mcanal@...lia.com>
Best Regards,
- Maíra
> ---
> drivers/gpu/drm/tests/drm_kunit_helpers.c | 62 +++++++++++++++++++++++++++++++
> include/drm/drm_kunit_helpers.h | 10 +++++
> 2 files changed, 72 insertions(+)
>
> diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c
> index 32dc8354641a..d5317d13d3fc 100644
> --- a/drivers/gpu/drm/tests/drm_kunit_helpers.c
> +++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c
> @@ -249,5 +249,67 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
> }
> EXPORT_SYMBOL_GPL(drm_kunit_helper_create_primary_plane);
>
> +static const struct drm_crtc_helper_funcs default_crtc_helper_funcs = {
> +};
> +
> +static const struct drm_crtc_funcs default_crtc_funcs = {
> + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
> + .reset = drm_atomic_helper_crtc_reset,
> +};
> +
> +/**
> + * drm_kunit_helper_create_crtc - Creates a mock CRTC for a KUnit test
> + * @test: The test context object
> + * @drm: The device to alloc the plane for
> + * @primary: Primary plane for CRTC
> + * @cursor: Cursor plane for CRTC. Optional.
> + * @funcs: Callbacks for the new plane. Optional.
> + * @helper_funcs: Helpers callbacks for the new plane. Optional.
> + *
> + * This allocates and initializes a mock struct &drm_crtc meant to be
> + * part of a mock device for a KUnit test.
> + *
> + * Resources will be cleaned up automatically.
> + *
> + * @funcs will default to the default helpers implementations.
> + * @helper_funcs will default to an empty implementation.
> + *
> + * Returns:
> + * A pointer to the new CRTC, or an ERR_PTR() otherwise.
> + */
> +struct drm_crtc *
> +drm_kunit_helper_create_crtc(struct kunit *test,
> + struct drm_device *drm,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const struct drm_crtc_helper_funcs *helper_funcs)
> +{
> + struct drm_crtc *crtc;
> + int ret;
> +
> + if (!funcs)
> + funcs = &default_crtc_funcs;
> +
> + if (!helper_funcs)
> + helper_funcs = &default_crtc_helper_funcs;
> +
> + crtc = drmm_kzalloc(drm, sizeof(*crtc), GFP_KERNEL);
> + KUNIT_ASSERT_NOT_NULL(test, crtc);
> +
> + ret = drmm_crtc_init_with_planes(drm, crtc,
> + primary,
> + cursor,
> + funcs,
> + NULL);
> + KUNIT_ASSERT_EQ(test, ret, 0);
> +
> + drm_crtc_helper_add(crtc, helper_funcs);
> +
> + return crtc;
> +}
> +EXPORT_SYMBOL_GPL(drm_kunit_helper_create_crtc);
> +
> MODULE_AUTHOR("Maxime Ripard <maxime@...no.tech>");
> MODULE_LICENSE("GPL");
> diff --git a/include/drm/drm_kunit_helpers.h b/include/drm/drm_kunit_helpers.h
> index 38667d624aa8..6e99627edf45 100644
> --- a/include/drm/drm_kunit_helpers.h
> +++ b/include/drm/drm_kunit_helpers.h
> @@ -9,6 +9,8 @@
>
> #include <kunit/test.h>
>
> +struct drm_crtc_funcs;
> +struct drm_crtc_helper_funcs;
> struct drm_device;
> struct drm_plane_funcs;
> struct drm_plane_helper_funcs;
> @@ -110,4 +112,12 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
> unsigned int num_formats,
> const uint64_t *modifiers);
>
> +struct drm_crtc *
> +drm_kunit_helper_create_crtc(struct kunit *test,
> + struct drm_device *drm,
> + struct drm_plane *primary,
> + struct drm_plane *cursor,
> + const struct drm_crtc_funcs *funcs,
> + const struct drm_crtc_helper_funcs *helper_funcs);
> +
> #endif // DRM_KUNIT_HELPERS_H_
>
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